I bought 10 of these damn toshiba darlington arrays and i can't get a single 1 to behave :((((
to simplify things
it's running off a 5v rail (usb/arduino)
basically.. without gnd it lights dimly with gnd nothing!!! i tried 5ics it's like they all came fried i'm a little worried trying the other 5 incase i'm blowing them somehow?!?
thanks..
I didn't understand any of that. What "toshiba darlington arrays"? Part number? Link to data sheet?
it's running off a 5v rail (usb/arduino)
What circuit?
What code? Or isn't that relevant?
You need to connect PIN10 to VCC.
Nick - re read the title 
the pictures are of the circuit.. all im doing is making sure these ics work
Ok ill try that lavan cheers
Yayyyy pin 10 solved it thanks 
You are welcome
just to add, I ran into an opposite problem when I connected this to an 8 channel relay board, which already comes with its own diode circuit connected to supply rail. In my case, I connected pin 10 to Vcc and was getting unpredictable results, until I disconnected pin 10.